Data: Climate Central; Note: Map shows data for two largest cities in each state, where available; Map: Axios Visuals
Allergy season is getting longer in Nashville and around the nation amid climate change, Axios'Alex Fitzpatrick writes from a new Climate Central analysis.
The big picture: Plants' freeze-freegrowing season lengthened from 1970 to 2025 in nearly 90% of the 198 cities analyzed in the climate research group's latest report.
The extended timebetween the last and first freeze helped determine the length of allergy seasons around the country.
Zoom in: In Nashville, shifting trends added about a month to our annual allergy season, according to the data.
What they're saying: Climate Centralvice president for science Kristy Dahl said longer allergy seasons were "a clear signal of a warming world, driven by carbon pollution."
"As temperatures rise,freeze-free seasons are stretching in every region of the country, giving plants weeks of extra time to grow and release pollen."
"For millions of Americans, that means earlier, longer, and often more intense allergy seasons that can take a real toll on health and daily life."
What's next: Nashville's unseasonably warm stretch is expected to continue this week, with highs in the next few days pushing toward 80.